Ore-concentrator.



PATENTED AUG. 16, 1904.

C. A. CHRISTENSEN. ORE GONGENTRATOR.

APPLICATION FILED OUT. 19, 1903.

2 SHEBTSSHEET 1.

NO MODEL.

Witnesses Attorney No. 767,926. PATENTED AUG. 16, 1904.

c. A. CHRISTENSEN.

ORE GONCENTRATOR. APPLIOATION FILED 0119, 190s.

Inventor Wines es r I By I Attorney Patented August 16, 1904.

PATENT OFFICE.

OHRISTOFFER CHRISTENSEN, OF ORETOINN, OREGON.

ORE-CONCENTRATOR.

SPECIFICATION forming part of Letters Patent No. 767,926, dated August 16, 1904.

Application filed October 19, 1903.

To all whom it may concern.-

Be it known that I, OHRISTOEFER A. CHRIS- TENsEN,a citizen of the United States,residing at Oretown, in the county of Tillamook and State of Oregon,have invented certain new and useful Improvements in Ore-Concentrators; and I do declare the following to be a full,clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to-improvemenrs in ore-concentrators.

The object of the invention is to provide a machineof this character whereby the metal and valuable concentrates are separated from the pulverized or crushed ore.

A further object is to provide a concentrator for ores which will be simple in construction, strong, and durable and by the use of which both the heavy and lighter particles of metal will be separated 'from the ore collected and discharged from the concentrator without stopping the motion of the same for the removal of the concentrated metal, thus permitting a continuous operation of the machine.

With these and other objects in view the invention consists of certain novel features of construction, combination, and arrangement of parts, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawings, Figure 1 is a plan view of the concentrator. Fig. 2 is a vertical longitudinal sectional View. Fig. 3 is a vertical cross-sectional view. Fig. 4 is a detail view of one of the water-discharging troughs.

In the construction of the invention a frame 1 is provided, which is of diamond shape or form, having side pieces 2, end pieces 3, and a series of cross-pieces 4. Along one side of the frame at the end of each cross-piece and the end piece 3 are fixed beveled or wedgeshaped blocks 5, and on said blocks, cross, and end pieces is placed a covering 6,0f boards laid lengthwise across the same, thus producing a table which is inclined upwardly along one side, as shown at 7. On said table is ar- Serial No. 177,592. (No model.)

ranged a series of rifles 8, of which there may be as many as desired, twenty-four being shown in the drawings, this being the preferred number. The rifles are formed by laying the required number of boards 9 on the table, so that the edges of the same will overlap, the underlying edge 10 of each board being beveled, as shown, the overlapping edges of the boards forming the pockets 01' rifles 8, which catch and hold the particles of metal. The ends of the boards which form the rifles are inclined upwardly at one end, owingto the rise 7 formed along one side of the table, thereby producing a rise in the riffies up which the particles of metal are forced.

being disposed beneath the upwardly-inclined ends of the rifles.

Fixed on the upwardly-inclined portion of the rifle, as shown, so that the water discharging from the same runs down onto the mass in the rifle and prevents the same from banking and at the same time washing back any lighter particles of sand or gravel that may have reached this side of the table.

A spray-pipe 17 is arranged above the short troughs 15, said pipe being provided with a discharge-opening above each trough, whereby water is directed into the same and by said troughs is directed and discharged onto the metal in the rifles.

At the upper end of the table and over the first rifle-board is arranged a feed box or hopper 18, said box extending about half-way across the table and on the side opposite the rise 7. In the bottom of said box are formed pulverized ore is distributed on said board, together with'a suflicient supply of water to keep it moving over the riffle.

In order that the particles of metal which have settled by gravity to the bottom of the rifiies may be forced across the table and up the incline at the opposite side of the same, a jogging or sudden jarring motion is given to the table, whereby the material is thrown by degrees across the same. Any suitable means may be employed for producing said jarring motion. In the present instance the table is hung or supported to vibrate in a frame 19 by means of hangers 20, pivotally connected at their ends to the frame 19 and to the table, the hangers at one end of the frame is connected an adjustable bar 22, the inner end of which is threaded and passes through an opening 23 in one of the side pieces 2 of the framework of the table and is adapted to receive adjusting-nuts 24 and 25, arranged on each side of the piece 2, wedge-shaped blocks 26 being fixed to said side piece to present square faces against which the nuts are adapted to bear. By screwing the nuts in one or the other direction the bar may be lengthened or shortened, as will be understood.

The bar 22 is flattened on its outer end and has formed therein a longitudinally-disposed slot 27 in which is adapted to work a double cam-disk 28, which is fixed 'to a shaft 29, journaled in bearings on the frame 19 and driven by any suitable means. (Not shown.)

As the shaft 29 is rotated in the direction of the arrow shown in Fig. 2 the eccentric faces of the cam will alternately engage the wall of slot 27 and force the bar 22 and table in one direction against the tension of the spring 21, and as each cam-is disengaged from the wall of the slot the spring will jerk the table back.

In order to produce a sudden jar to the table to force or throw the concentrates collected in each riflie up the incline at one side of the table and into the trough 14, provided vcam-faces from the wall of the slot 27 in the bar 22. Thus a succession of jars or sudden stops is given the table, the rapidity of which may be determined by the speed with which the shaft 29 is rotated. The force of said jars is controlled by lengthening or shortening the bar 22, thereby regulating the distance between the stops 30 carried by the table and the stop-bar 31 on the frame 19.

The peculiar diamond shape in which the table is formed and the position of the feed box or hopper thereon causes the material to be thinly and evenly spread out on the riflie-boards and retains the water discharged therewith, thereby preventing the banking of the material and allowing the lighter substances in the mass to be disengaged and washed over the riflies, while the heavier metal sinks by gravity into the bottom of the riflies'and is jarred across the table and discharged into the trough, as hereinbefore described.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. An ore-concentrator, consisting of a diamond shaped table having riflies formed across the same, said table provided with a rise or upward incline along one side and up which the ends of said riffles extend, troughs upon said rise or upward incline provided with lateral outlets facing the lowest portions or bottoms of the rifiies, means for supplying water to said troughs, a receiving-trough disposed beneath the upwardly-inclined ends of the riflies, a hopper at the upper side of the trough and opposite end from the said rise or upward incline, and means for imparting vibratory jarring motion to the table, substantially as described.

2. An ore-concentrator consisting of a diamond shaped table having rifiies formed across the same, said table being provided with a rise or upward incline along one side and up which the ends of said rifiles extend, a receiving-trough arranged at the delivery side of the table beneath the elevated ends of the riflies and provided with lateral discharges to discharge water into the lowermost portions of the pockets or rifiles, a feed-pipe arranged above said trough to supply water thereto, a feed box or hopper arranged above the uppermost riiile and in position to discharge its contents upon the half of the table farthest from the elevated end thereof, means for producing a variable vibratory movement of the table, and means for jarring the table, substantially as described.

3. An ore-concentrator consisting of adiamond-shaped frame, a table formed on said frame, having an upward incline or rise formed along one side thereof, a series of transverselydisposed overlapping boards arranged on said table and extending up said incline or rise,

said boards forming riflles, upwardly-projecting boards formed along the upper end and across one side of said table, a trough or receptacle arranged along the opposite side thereof beneath the elevated ends of said riffle-boards, short troughs arranged on the elevated portion of each riflile-board, said troughs being open at each end and having in one side slits whereby water is discharged therefrom onto the contents of said rifiles, a feed-pipe arranged above said troughs, perforations formed in said pipe above each trough to sup ply water to the same, a feed box or hopper arranged above and in position to discharge its contents on that half of the uppermost riffle-board, farthest from the elevated portion of the same, a stationary framework, means for supporting said table in said framework in a slanting position, a rotatable shaft journaled in said framework, a double cam fixed on said shaft, an adjustable bar carried by the table and adapted to engage said cam, whereby said table is moved in one direction, a spring connected to the opposite side of the table and to said framework, whereby the former will be jerked back as said cam is disengaged from said adjustable bar, stops carried by said table-frame and arranged to engage a fixed stop on said framework whereby said table is suddenly stopped and jarred when jerked back by said spring, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnes'ses.

CHRISTOFFER A. CHRISTENSEN.

Witnessesf W. H. CHRISTENSEN, STELLA V. CHRISTENSEN. 

